3 sentences

1. 健康的牙龈是结实的，粉色的，不流血的。

   jiàn​kāng de yá​yín shì jiē​shi de, fěn​sè de, bù liú xuè de.

   Healthy gums are firm, pink and do not bleed.

   Source: CCMatrix

2. 一根头发比同等粗细的铜丝还要结实。

   yī gēn tóu​fa bǐ tóng​děng cū​xì de tóng​sī hái​yào jiē​shi.

   A human hair is stronger than copper wire of the same thickness.

   Source: UM-Corpus: Science

3. 他矮壮结实，脖子很粗。

   tā ǎi zhuàng jiē​shi, bó​zi hěn cū.

   He was short and stocky, and had a thick neck.

   Source: AI Challenger 2017